Another old model brought back to life. This is the Click on the image below to see the model in action. This is the ternary system quartz – nepheline – kalsilite, also called petrogeny’s residua system, which is used to describe the composition of many cooled residual magmas and the genesis of very under saturated alkaline rocks.

More on this classification, used for cooled residual magmas, on Alessandro Da Mommio’s website, for example his page on Tracheite.

Blogroll

Meta

Go ahead if you want to use my code, modify it, improve it, for non-commercial AND for commercial use. You are also welcome to download and reuse my media files - unless otherwise stated. With both code and images, please give full and clear credit to Matteo Niccoli as the author and mycarta.wordpress.com as the source.
WordPress bloggers are welcome to reblog my posts. For republishing outside of WordPress or any other request, please e-mail me at: matteo@mycarta.ca